/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.1
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
	This file is part of foam-extend.

	foam-extend is free software: you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the
	Free Software Foundation, either version 3 of the License, or (at your
	option) any later version.

	foam-extend is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#include "globalIndex.H"

// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::globalIndex::globalIndex(const label localSize)
:
	offsets_(Pstream::nProcs())
{
	labelList localSizes(Pstream::nProcs());
	localSizes[Pstream::myProcNo()] = localSize;
	Pstream::gatherList(localSizes);
	Pstream::scatterList(localSizes);   // just to balance out comms

	label offset = 0;
	forAll(offsets_, procI)
	{
		label oldOffset = offset;
		offset += localSizes[procI];

		if (offset < oldOffset)
		{
			FatalErrorIn("globalIndex::globalIndex(const label)")
				<< "Overflow : sum of sizes " << localSizes
				<< " exceeds capability of label (" << labelMax
				<< "). Please recompile with larger datatype for label."
				<< exit(FatalError);
		}
		offsets_[procI] = offset;
	}
}


Foam::globalIndex::globalIndex(Istream& is)
{
	is >> offsets_;
}


// * * * * * * * * * * * * * * * Friend Operators  * * * * * * * * * * * * * //

Foam::Istream& Foam::operator>>(Istream& is, globalIndex& gi)
{
	return is >> gi.offsets_;
}


Foam::Ostream& Foam::operator<<(Ostream& os, const globalIndex& gi)
{
	return os << gi.offsets_;
}


// ************************************************************************* //
